Overall this game is ok.
Few things that can be improved:
1. The weapons are unbalanced. I found the first pistol to be the best weapon to use.
2. The game become easier as you proceed. At some point I chose to quit the game became I got bored. It should become more difficult the longer you play so in some point you will loose.
3. Repetitive. very limited variety of enemies, no bosses or any special events, no ending, no point.
Things that were good:
1. The supply system was interesting.
2. Ability to place mines, I found it very fun to determine were the enemy will pass and place mines there, and then hear them explode.
I hope you will find this feedback useful for your next projects!